Sizes and Temperature Profiles of Quasar Accretion Disks from Chromatic Microlensing

@article{Blackburne2010SizesAT,
  title={Sizes and Temperature Profiles of Quasar Accretion Disks from Chromatic Microlensing},
  author={Jeffrey A. Blackburne and David Pooley and Saul A. Rappaport and Paul L. Schechter Ohio State and Mit and Eureka Scientific},
  journal={The Astrophysical Journal},
  year={2010},
  volume={729},
  pages={34}
}
Microlensing perturbations to the flux ratios of gravitationally lensed quasar images can vary with wavelength because of the chromatic dependence of the accretion disk's apparent size. Multiwavelength observations of microlensed quasars can thus constrain the temperature profiles of their accretion disks, a fundamental test of an important astrophysical process which is not currently possible using any other method. We present single-epoch broadband flux ratios for 12 quadruply lensed quasars… 
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References

SHOWING 1-10 OF 68 REFERENCES
THE STRUCTURE OF THE ACCRETION DISK IN THE LENSED QUASAR SBS 0909+532
We derive the size and temperature profile of the accretion disk of the lensed quasar SBS 0909+532 by measuring the wavelength dependence (chromaticity) of the microlensing magnification produced by
Size is everything : universal features of quasar microlensing with extended sources
We examine the effect that the shape of the source brightness profile has on the magnitude fluctuations of images in quasar lens systems due to microlensing. We do this by convolving a variety of
A microlensing study of the accretion disc in the quasar MG 0414+0534
Observations of gravitational microlensing in multiply imaged quasars currently provide the only direct probe of quasar emission region structure on submicroarcsecond scales. The analyses of
Microlensing variability in the gravitationally lensed quasar QSO 2237+0305 ≡ the Einstein Cross II. Energy profile of the accretion disk ,
We present the continuation of our long-term spectroscopic monitoring of the gravitationally lensed quasar QSO 2237 + 0305. We investigate the chromatic variations observed in the UV/optical
The accretion disc in the quasar SDSS J0924+0219★
We present single-epoch multiwavelength optical-near-infrared observations of the 'anomalous' lensed quasar SDSS J0924+0219, made using the Magellan 6.5-m Baade Telescope at Las Campanas Observatory,
X-Ray and Optical Flux Ratio Anomalies in Quadruply Lensed Quasars. I. Zooming in on Quasar Emission Regions*
X-ray and optical observations of quadruply lensed quasars can provide a microarcsecond probe of the lensed quasar, corresponding to scale sizes of ~102-104 gravitational radii of the central black
Quantitative Interpretation of Quasar Microlensing Light Curves
We develop a general method for analyzing the light curves of microlensed quasars and apply it to the OGLE light curves of the four-image lens Q2237+0305. We simultaneously estimate the effective
The Quasar Accretion Disk Size-Black Hole Mass Relation
We use the microlensing variability observed for 11 gravitationally lensed quasars to show that the accretion disk size at a rest-frame wavelength of 2500 A is related to the black hole mass by log(R
The Spatial Structure of an Accretion Disk
Based on the microlensing variability of the two-image gravitational lens HE 1104-1805 observed between 0.4 and 8 μm, we have measured the size and wavelength-dependent structure of the quasar
Microlensing of an extended source by a power-law mass distribution
Microlensing promises to be a powerful tool for studying distant galaxies and quasars. As the data and models improve, there are systematic effects that need to be explored. Quasar continuum and
...
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